Journal ArticleDOI
Relativistic Random-Phase Approximation
TLDR
The relativistic random phase approximation (RRPA) as discussed by the authors was developed from linearized time-dependent Hartree-Fock theory and applied to determine excitation energies and oscillator strengths along the He, Be, Mg, Zn and Ne isoelectronic sequences.Abstract:
The relativistic random phase approximation RRPA is developed from linearized time-dependent Hartree-Fock theory. Applications of the resulting relativistic many-body equations to determine excitation energies and oscillator strengths along the He, Be, Mg, Zn and Ne isoelectronic sequences are discussed and compared with other recent experimental and theoretical work. The multi-channel RRPA treatment of photoionization is described and applications are given to total cross sections, branching ratios, angular distributions and to autoionizing resonances.read more
Citations
More filters
Journal ArticleDOI
Photoionization of atoms using synchrotron radiation
TL;DR: A comprehensive review of photoionization of rare gas atoms using monochromatized synchrotron radiation is given in this paper, with a focus on the general experimental and theoretical background.
Journal ArticleDOI
QED theory of the spectral line profile and its applications to atoms and ions
Oleg Yu. Andreev,Oleg Yu. Andreev,Leonti Labzowsky,Leonti Labzowsky,Günter Plunien,Dmitry Solovyev,Dmitry Solovyev +6 more
TL;DR: A review of the current status of the theoretical study of spectral line profiles for systems with few electrons is given in this article, in particular, the asymmetry of the line profile beyond the resonance approximation and the overlap of the resonances are investigated.
Journal ArticleDOI
Beyond the dipole approximation: angular-distribution effects in valence photoemission
Oliver Hemmers,G. R. Fisher,Peter Glans,D. L. Hansen,H. Wang,S. B. Whitfield,Ralf Wehlitz,Jon C. Levin,Ivan A. Sellin,Rupert C. C. Perera,E. W. B. Dias,Himadri Chakraborty,Pranawa C. Deshmukh,Steven T. Manson,Dennis W. Lindle +14 more
TL;DR: In this article, angle-resolved-photo-emission measurements of valence photoelectrons with higher multipole photon interactions have been studied. And the results suggest that any photoemission experiment, on any sample, can be affected at relatively low photon energies.
Journal ArticleDOI
Relativistic atomic structure calculations
TL;DR: In this paper, a review of methods for computing the electronic structures of atoms based on the use of relativistic quantum mechanics is presented with some account of the underlying physical assumptions, and the way in which these formulas are translated into practical computer codes is briefly discussed as well.
Journal ArticleDOI
Photodetachment of negative halogen ions.
TL;DR: Results of relativistic random-phase approximation calculations of photodetachment cross sections and angular-distribution asymmetry parameters are presented for the outer shells of the negative ions in the photon-energy region from the threshold to about 100 eV.
References
More filters
Journal ArticleDOI
Spectral Distribution of Atomic Oscillator Strengths
TL;DR: In this paper, the spectrum of oscillator strength for neutral atoms in their ground states is surveyed with particular regard to recent progress in the far uv-soft x-ray range and to the theoretical interpretation of data from experiments and from numerical calculations.
Journal ArticleDOI
Relativistic calculation of atomic structures.
TL;DR: In this article, the state of the art in relativistic calculation of atomic structures is surveyed and the theory is modelled on the practice in non-relativistic calculations, using many-particle wave functions built from Dirac central field spinors.